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Lebepe J, Oberholster PJ, Luus-Powell WJ. Dataset of metal(loid) concentrations recorded in the tissues of two fish species from Flag Boshielo Dam, South Africa. Data Brief 2020; 33:106396. [PMID: 33102659 PMCID: PMC7569288 DOI: 10.1016/j.dib.2020.106396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 10/01/2020] [Accepted: 10/05/2020] [Indexed: 11/29/2022] Open
Abstract
Metal(loid) pollution in aquatic ecosystems has become a cause for concern, particularly in areas where communities depend on services from these systems for their livelihood. This dataset presents the metal(loi) concentrations recorded in the water column, bottom sediment, and tissues of Oreochromis mossambicus and Labeo rosae from Flag Boshielo Dam, an impoundment in one of the most polluted river systems in Southern Africa, the Olifants River. The concentrations of metal(loid)s were measured using inductively coupled plasma-optical emission spectrophotometry (ICP-OES; Perkin Elmer, Optima 2100DV). The data generated attest that in aquatic ecosystems, metal(loid)s do not remain in suspension in the water column, but sink down to the bottom sediment where they accumulate or get taken up by receptor organisms such as fish. It further confirm that there is a clear separation on the extent to which metal(loid)s are accumulating in different tissues and liver mostly accumulate higher concentration followed by gills and muscle, respectively. These data can be useful to guide future studies aiming to understand the dynamics, pathways and fate of metal(loid)s in relation to water, sediment and fish tissues. These data can also be used for decision making in relation to the establishment of freshwater fisheries in dams receiving metal(loid)s from different land use activities.
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Affiliation(s)
- Jeffrey Lebepe
- School of Life Sciences, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Paul J Oberholster
- Centre for Environmental Management, University of the Free State, Bloemfontein 9300, South Africa
| | - Wilmien J Luus-Powell
- Department of Biodiversity, DST-NRF SARCHI (Ecosystem Health), University of Limpopo, Sovenga 0727, South Africa
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Sara JR, Luus-Powell WJ, Fogelson SB, Botha H, Guillette TC, Smit WJ, Hoffman A, Kunutu KD, Koelmel JP, Bowden JA. A histological evaluation of pansteatitis-affected Mozambique tilapia, Oreochromis mossambicus (Peters 1852), from different geographical locations in South Africa. J Fish Dis 2020; 43:1185-1199. [PMID: 32740987 DOI: 10.1111/jfd.13184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 05/03/2020] [Accepted: 05/04/2020] [Indexed: 06/11/2023]
Abstract
Pansteatitis is the leading cause for the decline in Nile crocodile populations and the sporadic mortality of fish in the Olifants River System, South Africa. To determine the prevalence of this disease in lentic systems, Mozambique tilapia, Oreochromis mossambicus, were collected from Lake Loskop, Lake Flag Boshielo, Phalaborwa Barrage and Lake Luphephe-Nwanedi. The former three impoundments are located within the main stem of the Olifants River, while the latter, which is geographically isolated and situated in the Limpopo River System, served as a reference site. Mesenteric adipose, liver, serosa of the swim bladder, gill and the skeletal muscle of fish sampled were examined for gross and microscopic evidence of pansteatitis. Microscopically observed changes were used to statistically compare pansteatitis prevalence between samples and sites. Based on histopathological evaluation, the adipose tissue in the liver, swim bladder serosa and coelom from severely debilitated individuals showed the most significant pathological changes. Lesions indicative of steatitis were observed in fish collected from Lake Loskop (75%), Lake Flag Boshielo (22%) and Lake Luphephe-Nwanedi (15%). Further investigation is warranted to understand the pervasiveness and mechanisms driving pathological changes of pansteatitis at Lake Flag Boshielo, Phalaborwa Barrage and Lake Luphephe-Nwanedi.
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Affiliation(s)
- Joseph R Sara
- Department of Biodiversity, University of Limpopo, Sovenga, South Africa
- DSI/NRF Research Chair in Ecosystem Health, University of Limpopo, Sovenga, South Africa
| | - Wilmien J Luus-Powell
- Department of Biodiversity, University of Limpopo, Sovenga, South Africa
- DSI/NRF Research Chair in Ecosystem Health, University of Limpopo, Sovenga, South Africa
| | - Susan B Fogelson
- Pathology Consulting Services, Fishhead Labs, LLC, Stuart, FL, USA
| | - Hannes Botha
- Department of Biodiversity, University of Limpopo, Sovenga, South Africa
- Scientific Services, Mpumalanga Tourism and Parks Agency, Nelspruit, South Africa
| | - Theresa C Guillette
- Department Sciences, Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, USA
| | - Willem J Smit
- Department of Biodiversity, University of Limpopo, Sovenga, South Africa
- DSI/NRF Research Chair in Ecosystem Health, University of Limpopo, Sovenga, South Africa
| | - Andre Hoffman
- Scientific Services, Mpumalanga Tourism and Parks Agency, Nelspruit, South Africa
| | - Katlego D Kunutu
- Department of Biodiversity, University of Limpopo, Sovenga, South Africa
- DSI/NRF Research Chair in Ecosystem Health, University of Limpopo, Sovenga, South Africa
| | - Jeremy P Koelmel
- Environmental Health Sciences, Yale University, New Haven, CT, USA
| | - John A Bowden
- Chemical Sciences Division, Hollings Marine Laboratory, National Institute of Standards and Technology, Charleston, SC, USA
- Department of Physiological Sciences, Center for Environmental and Human Toxicology, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA
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Lebepe J, Oberholster PJ, Ncube I, Smit W, Luus-Powell WJ. Metal levels in two fish species from a waterbody impacted by metallurgic industries and acid mine drainage from coal mining in South Africa. J Environ Sci Health A Tox Hazard Subst Environ Eng 2019; 55:421-432. [PMID: 31868083 DOI: 10.1080/10934529.2019.1704604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/05/2019] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
The Loskop Dam in South Africa is the most contaminated waterbody in the Olifants River which is a transboundary river that flows into Mozambique. The present study measured selected metal concentrations in the muscle of Labeo rosae and Oreochromis mossambicus from Loskop Dam, and assessed the human health risks associated with consumption of these fish species. Trace metals were below detection level in the surface water whereas bottom sediment exhibited relatively higher concentrations. A significant seasonal variations (p < 0.05) as well as inter-species difference (p < 0.05) of metal concentrations were observed in the fish muscle. Selenium concentration showed to have increase over the recent few years. Concentrations exceeding permissible level for human consumption was recorded for As, Se and Sb in both species. Other metals which THQ > 1 was Cr for L. rosae and Co for O. mossambicus. The current study shows that there could be some serious health and environmental implications for rural communities making use of Loskop Dam fish as food source. These findings add to knowledge in Africa, particularly South Africa, where other fish species have been identified as being potentially dangerous for human consumption in terms of Se, Sb, As, Co and Cr levels.
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Affiliation(s)
- Jeffrey Lebepe
- School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Paul J Oberholster
- Centre for Environmental Management, University of the Free State, Bloemfontein, South Africa
| | - Ignatious Ncube
- Biotechnology Unit, Faculty of Science and Agriculture, University of Limpopo, Sovenga, South Africa
| | - Willem Smit
- Department of Biodiversity, Faculty of Science and Agriculture, University of Limpopo, Sovenga, South Africa
| | - Wilmien J Luus-Powell
- Department of Biodiversity, Faculty of Science and Agriculture, University of Limpopo, Sovenga, South Africa
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Huchzermeyer KDA, Woodborne S, Osthoff G, Hugo A, Hoffman AC, Kaiser H, Steyl JCA, Myburgh JG. Pansteatitis in polluted Olifants River impoundments: nutritional perspectives on fish in a eutrophic lake, Lake Loskop, South Africa. J Fish Dis 2017; 40:1665-1680. [PMID: 28493486 DOI: 10.1111/jfd.12633] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 02/10/2017] [Accepted: 02/12/2017] [Indexed: 06/07/2023]
Abstract
This study compares the aetiology of pansteatitis in Lake Loskop, relative to two other impoundments along the Olifants River. Macroscopic and microscopic pathology, age determination and analysis of stomach content, fatty acids and stable isotopes explain the high prevalence of pansteatitis in Oreochromis mossambicus (Peters) and several other species in Lake Loskop. All the dietary indicator comparisons between pansteatitis-affected and healthy fish fail to support a systemic cause. Pansteatitis in Lake Loskop was linked to size and weight of O. mossambicus, but not to ontogenic age. Fish in Lake Loskop showed abnormally high omega-3 to omega-6 fatty acid ratios normally only found in marine fish with no significant difference in degree of assimilation of these fatty acids between pansteatitis-affected and healthy fish. This explains the vulnerability to, but not the occurrence of, pansteatitis. As a cause for the pansteatitis, these results point towards sporadic vitamin E-depleting trigger events, known sporadic fish die-off occurrences that provide surviving fish with a rich source of rancid fats on which to scavenge. The mechanism ties pansteatitis to eutrophication and trophic cascade effects, the intrinsic drivers of the disease and suggests an adaptive management strategy that might be applied by relevant conservation authorities.
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Affiliation(s)
- K D A Huchzermeyer
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
- Department of Ichthyology and Fisheries Science, Rhodes University, Grahamstown, South Africa
| | - S Woodborne
- iThemba LABS, Johannesburg, South Africa
- Mammal Research Institute, University of Pretoria, Pretoria, South Africa
| | - G Osthoff
- Microbial Biochemical and Food Biotechnology, Faculty of Natural and Agricultural Sciences, University of the Free State, Bloemfontein, South Africa
| | - A Hugo
- Microbial Biochemical and Food Biotechnology, Faculty of Natural and Agricultural Sciences, University of the Free State, Bloemfontein, South Africa
| | - A C Hoffman
- Scientific Services, Mpumalanga Tourism and Parks Agency, Nelspruit, South Africa
| | - H Kaiser
- Department of Ichthyology and Fisheries Science, Rhodes University, Grahamstown, South Africa
| | - J C A Steyl
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - J G Myburgh
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
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Dabrowski J, Oberholster P, Steyl J, Osthoff G, Hugo A, Power DM, van Wyk JH. Thyroid function of steatitis-affected Mozambique tilapia Oreochromis mossambicus from a sub-tropical African reservoir. Dis Aquat Organ 2017; 125:101-113. [PMID: 28737156 DOI: 10.3354/dao03138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Thyroid function and nutritional indicators were measured in obese, steatitis-affected Mozambique tilapia Oreochromis mossambicus from Loskop Reservoir (LR), South Africa. Plasma thyroid hormones (especially T3) and thyroid follicle histomorphology revealed high levels of activity in every aspect of the thyroid cascade measured in fish from LR compared to a reference population of steatitis-free fish. Concurrent measurements of nutritional state including plasma lipids, liver lipid content and hepatocyte size showed that fish from LR had significant energy stores indicative of abundant nutritional intake. There were distinct sex and seasonal differences, with the highest plasma lipids and T3 levels observed in steatitis-affected females during spring and summer. Positive correlations were observed between plasma lipids (especially cholesterol) and T3 concentrations in fish from both populations, indicating a link between lipid metabolism and thyroid function. There was no direct evidence of thyroid disruption, but this cannot be ruled out until further research determines the factors that underlie the homeostatic shift leading to elevated plasma and liver lipids and T3 levels in steatitis-affected tilapia.
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Affiliation(s)
- J Dabrowski
- Sustainability Research Unit, Nelson Mandela Metropolitan University, Private Bag x6531, George 6530, South Africa
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Jooste A, Marr SM, Addo-Bediako A, Luus-Powell WJ. Sharptooth catfish shows its metal: a case study of metal contamination at two impoundments in the Olifants River, Limpopo river system, South Africa. Ecotoxicol Environ Saf 2015; 112:96-104. [PMID: 25463859 DOI: 10.1016/j.ecoenv.2014.10.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 10/21/2014] [Accepted: 10/24/2014] [Indexed: 06/04/2023]
Abstract
Clarias gariepinus is increasing in importance as a global aquaculture species with a 100 fold increase in production over the past decade but this species still remains one of the most important wild harvested freshwater food fish throughout rural Africa. However, this species has been shown to accumulate metals from contaminated inland waters. In this paper, the metal concentrations in muscle tissue of C. gariepinus from two main-stem impoundments in the Olifants River, Limpopo Basin, were measured and a desktop risk assessment based on the US-EPA methodology completed to evaluate whether long-term consumption of C. gariepinus from these impoundments may pose a health risk to rural communities. Our results show that metals are accumulating in the muscle tissue of C. gariepinus and have appeared to have increased in the last two decades. Risk assessment generated Hazard quotients (HQ) greater than 1 indicate that long term consumption of fish from these impoundments may cause adverse health impacts. We found that lead (HQ=9), antimony (HQ=14), cobalt (HQ=2) and chromium (HQ=1) at one impoundment and lead (HQ=2) at the other impoundment were above acceptable levels for weekly consumption of 150 g C. gariepinus muscle tissue.
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Affiliation(s)
- Antoinette Jooste
- Department of Biodiversity, University of Limpopo, P/Bag X1106, Sovenga 0727, South Africa.
| | - Sean M Marr
- Department of Biodiversity, University of Limpopo, P/Bag X1106, Sovenga 0727, South Africa.
| | - Abraham Addo-Bediako
- Department of Biodiversity, University of Limpopo, P/Bag X1106, Sovenga 0727, South Africa.
| | - Wilmien J Luus-Powell
- Department of Biodiversity, University of Limpopo, P/Bag X1106, Sovenga 0727, South Africa.
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